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1.Robert Weinberg warns that the discovery of the causes or cancer cells won't necessarily lead to_______________________.
2.It is not easy to rind out how cancer works because__________________.
3.Once oncogenes in cells are at work.the cell will become_______________________.
4.By saying "We can't prepare a medicine against cosmic rays", William Hayward implies that it is impossible to avoid che impact of_______________________.
5.Provided that the mechanisms of cancer are found out we are able to_______________________.
